From 9e056a95681c39764634bf9be4f62253f2904c66 Mon Sep 17 00:00:00 2001
From: BlueRose <378100977@qq.com>
Date: Tue, 20 Feb 2024 16:02:31 +0800
Subject: [PATCH] vault backup: 2024-02-20 16:02:31

---
 .../plugins/various-complements/data.json     |  8 ++++
 .../VisualEffect/Niagara Module笔记.md        | 47 ++++++++++++++++++-
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/.obsidian/plugins/various-complements/data.json b/.obsidian/plugins/various-complements/data.json
index c5c973d..ca2b35d 100644
--- a/.obsidian/plugins/various-complements/data.json
+++ b/.obsidian/plugins/various-complements/data.json
@@ -166,6 +166,14 @@
           "lastUpdated": 1708241946481
         }
       }
+    },
+    "Niagara里面的相关类型": {
+      "Niagara里面的相关类型": {
+        "currentFile": {
+          "count": 1,
+          "lastUpdated": 1708410052197
+        }
+      }
     }
   }
 }
\ No newline at end of file
diff --git a/03-UnrealEngine/VisualEffect/Niagara Module笔记.md b/03-UnrealEngine/VisualEffect/Niagara Module笔记.md
index c4d2295..a6016a0 100644
--- a/03-UnrealEngine/VisualEffect/Niagara Module笔记.md	
+++ b/03-UnrealEngine/VisualEffect/Niagara Module笔记.md	
@@ -28,6 +28,11 @@ PS.**Niagara Debugger**工具可以用于检查粒子ID以及对应变量的变
 
 # 其他
 1. **发射器固定粒子ID**：勾选发射器上**RequiresPersistentIDs**选项即可固定。
+2. ExportParticleDataToBlueprint：可以输出CPU或者GPU变量
+	1. 在该节点上添加蓝图变量名。之后在蓝图的BeginPlay()设置这个变量为该蓝图类。之后实现ReceiveParticleData接口。
+	2. GPU 粒子数据导出是通过从 GPU 内存回读的方式进行的。这需要不可预知的非固定帧数，通常为 1-2 帧。
+	3. GPU 回读性能受限于回读缓冲区的大小。建议使用最小值的 GPU 固定大小分配来捕捉特定帧中可能发生的所有事件。任何超过固定大小的事件都将无法发送。
+3. Window - GeneratedCode可以看到生成出的HLSL代码。
 
 # 
 Particle的Module都是c++级别写死的。基本位于`Engine\Source\Runtime\Engine\Classes\Particles`目录。基类为**UParticleModule**；Niagara的Module都是蓝图资产，引擎自带的都在 `Engine\Plugins\FX\Niagara\Content\Modules`。基类为**UNiagaraScript**。
@@ -38,4 +43,44 @@ Particle的Module都是c++级别写死的。基本位于`Engine\Source\Runtime\E
 	- 相关接口，PreSave、Serialize、PostLoad；基类接口实现。
 	- FNiagaraVMExecutableData相关
 	- 编译相关。
-	- 其他。
\ No newline at end of file
+	- 其他。
+
+## Niagara里面的相关类型 
+### DataInterface
+基类为UNiagaraDataInterface。
+- UNiagaraDataInterface2DArrayTexture
+- UNiagaraDataInterfaceVirtualTexture
+
+## Texture相关Module
+- Textures
+	- SampleTexture
+	- SamplePseudoVolumeTexture
+	- SubUV_TextureSample
+	- WorldAlignedTextureSample
+- SubUV
+	- SubUVAnimation
+	- V2
+		- SubUVAnimation
+
+## 生成的代码
+```c++
+int2			Emitter_SampleTexture_Texture_TextureSize;
+int				Emitter_SampleTexture_Texture_MipLevels;
+Texture2D		Emitter_SampleTexture_Texture_Texture;
+SamplerState	Emitter_SampleTexture_Texture_TextureSampler;
+void SampleTexture2D_Emitter_SampleTexture_Texture(in float2 UV, in float MipLevel, out float4 OutValue)
+{
+	OutValue = Emitter_SampleTexture_Texture_Texture.SampleLevel(Emitter_SampleTexture_Texture_TextureSampler, UV, MipLevel);
+}
+
+
+void SampleTexture_Emitter_Func_(inout FSimulationContext Context)
+{
+    float4 SampleTexture2D_Emitter_SampleTexture_TextureOutput_Value;
+    SampleTexture2D_Emitter_SampleTexture_Texture(Context.MapSpawn.SampleTexture.UV, Constants_Emitter_SampleTexture_MipLevel, SampleTexture2D_Emitter_SampleTexture_TextureOutput_Value);
+    Context.MapSpawn.OUTPUT_VAR.SampleTexture.SampledColor = SampleTexture2D_Emitter_SampleTexture_TextureOutput_Value;
+    Context.MapSpawn.OUTPUT_VAR.SampleTexture.SamplerUV = Context.MapSpawn.SampleTexture.UV;
+    Context.MapSpawn.Particles.SampleTexture.SampledColor = SampleTexture2D_Emitter_SampleTexture_TextureOutput_Value;
+    Context.MapSpawn.Particles.SampleTexture.SamplerUV = Context.MapSpawn.SampleTexture.UV;
+}
+```
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